Data/hora: 27/07/2024 02:17:02

Provedor de dados: 	Tropical Plant Pathology: fitopatologia brasileira	
País: 	Brazil	
Título: 	Diagrammatic scale for assessment of soybean rust severity	
Autores: 	Godoy,Cláudia V.; Koga,Lucimara J.; Canteri,Marcelo G.	
Data: 	2006-02-01	
Ano: 	2006	
Palavras-chave: 	Disease assessment; Glycine max; Phakopsora pachyrhizi.	
Resumo: 	A diagrammatic scale to assess soybean (Glycine max) rust severity, caused by the fungus Phakopsora pachyrhizi, was developed in this study. Leaflets showing different severity levels were collected for determination of the minimum and maximum severity limits; intermediate levels were determined according to "Weber-Fechner's stimulus-response law". The proposed scale showed the levels of 0.6; 2; 7; 18; 42, and 78.5%. Scale validation was performed by eight raters (four inexperienced and four experienced), who estimated the severity of 44 soybean leaflets showing rust symptoms, with and without the use of the scale. Except for rater number eight, all showed a tendency to overestimate severity without the aid of the diagrammatic scale. With the scale, the raters obtained better accuracy and precision levels, although the tendency to overestimate was maintained. Experienced raters were more accurate and precise than inexperienced raters, and assessment improvements with the use of the scale were more significant for inexperienced raters.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582006000100011	
Editor: 	Sociedade Brasileira de Fitopatologia	
Relação: 	10.1590/S0100-41582006000100011	
Formato: 	text/html	
Fonte: 	Fitopatologia Brasileira  v.31 n.1 2006	
Fonte: 	info:eu-repo/semantics/openAccess